수담 vs Go

Sit down at the board, and your teacher is already there. Sudam is a fully offline Go (Baduk) app with KataGo — the world's strongest open-source Go engine — built right into your device. No internet, no sign-up, no server. 1. World-class AI, fully offline The KataGo engine lives inside the app, analyzing and responding instantly without a network. Every calculation happens on your device — and only on your device. 2. 27 levels, from 18-kyu to 9-dan Find the opponent that fits you on a finely graded 27-step ladder. Handicap games from 2 to 9 stones, adjustable komi, your choice of Black or White, and scoring under Korean rules. 3. Teaching Games with AlphaGomi Your AI teacher AlphaGomi compares your move with the best move every single turn, explaining the type of move, why it works, and how the game is likely to unfold — in clear, friendly language. 4. Review — down to "why that spot" Step through your game move by move and spot the turning points on the win-rate graph. In Explore mode, replay the AI's recommended lines or try your own ideas and judge the position. 5. Go proverbs, right when they apply In moments like atari, cuts, life & death, or a big group in danger, the Ten Golden Rules and time-honored proverbs appear one line at a time — so the principles sink in naturally. 6. Daily tsumego and Rank Challenges Fresh puzzles every day reveal your strengths and weaknesses by theme — life & death, atari, cutting, and more. Rank Challenges are played on a Korean byo-yomi clock, one rank at a time, with no analysis and no hints — pure skill. 7. Game Insights (weakness report) Sudam looks across your games to find the mistakes you repeat out of habit, organizes them by game phase and move type, and links each key scene straight into review. 8. Progress tracking and backup Rank history, AI match records, and puzzle accuracy on one dashboard. Export to SGF and back up or restore everything as a single file. Reviews, daily tsumego, and daily free games are yours to enjoy — and one single purchase unlocks everything forever: unlimited Teaching Games, Game Insights, and no ads. No account needed; your purchase restores on any device with the same store account. All your data stays on your device, on both iPhone and iPad.

Get a little stronger with every move. Go: One Move is a Go (Baduk / Weiqi) app for playing, solving, learning and reviewing with KataGo, a superhuman Go AI. Whether you are placing your first stone, coming back after years away, or already a dan player, you can sit down with an opponent at exactly your level right away. Made for you if • You are new to Go — a beginner tutorial where you learn by placing stones • You want an opponent at your level — 27 AI levels from 18 kyu to 9 dan • You want sharper reading — 1,256 classic life-and-death problems (tsumego) • You want to know where the game turned — winrate-graph review and AI coaching ■ An AI opponent at exactly your level 27 levels from 18 kyu to 9 dan. Pick any rank and play right away on a 9x9, 13x13 or 19x19 board — no sign-in needed. ■ 1,256 life-and-death problems Selected from classics that have been studied for centuries — Xuanxuan Qijing, Guanzi Pu, Gokyo Shumyo and Genran — in 5 levels. The board zooms in on the problem, solved problems are marked in the list, and you can view the solution when you get one wrong. Your stones are numbered as you play, and once solved you can keep playing the position freely, alternating Black and White. ■ Learn Go (beginner tutorial) Rules, capturing techniques, life and death, scoring, and getting ready for your first game. You learn by placing stones on the board, not just by reading. Short steps let you pick it up whenever you have a minute. ■ Ranked matches — win and face stronger opponents Sign in and get matched with an opponent that fits you. You start at 18 kyu and meet stronger opponents as you win, and your nickname, rank and record follow you to any device. ■ AI review and coaching Every game is saved to your account. Find the turning points on the winrate graph, then see the AI's suggested moves, winrates, expected lines and a score estimate at each key moment. ■ AI hints while you play Signed in, you can turn on AI hints and a score estimate during practice games. ■ Accurate scoring When the game ends, territory is counted under Korean rules (komi 6.5), with territory and dead stones marked on the board. ■ No misclicks Two-step move confirmation lets you place stones precisely, even on a 19x19 board. Practice games, life-and-death problems and the tutorial all work without signing in. When you do sign in, it takes just an email code — no separate sign-up. Play your first move today.